WorksheetsBiology exam part 1
Total questions: 34
Worksheet time: 2hrs 42mins
Which statement best describes loose connective tissue?
Holds organs in place throughout the body
Forms the hard mineralized bone matrix
Transports gases and nutrients in plasma
Provides high tensile strength in tendons
Where is fibrous connective tissue primarily located?
In tendons and ligaments
Within bone marrow cavities
Under epithelial surfaces
Lining blood vessel lumens
Which cell builds the mineralized matrix of bone tissue?
Osteoblast
Chondrocyte
Adipocyte
Leukocyte
Which statement about bone is accurate?
Contains osteoblasts and osteoclasts
Contains only chondrocytes
Lacks collagen fibers entirely
Is composed solely of elastic fibers
What is the primary role of adipose tissue?
Stores fat and insulates the body
Secretes synovial fluid into joints
Forms the rigid framework of skeleton
Carries dissolved gases in plasma
Which composition correctly matches cartilage matrix components?
Collagen fibers and chondroitin sulfate
Elastin fibers and calcium phosphate
Actin filaments and myosin heads
Keratin fibers and hyaluronic acid
Which feature distinguishes blood as a connective tissue?
Liquid extracellular matrix called plasma
Solid mineralized ground substance
Dense collagen fiber bundles
Gel-like proteoglycan network
Which are the primary formed elements of blood?
Red cells, white cells, and platelets
Chondrocytes, osteocytes, and fibroblasts
Myocytes, neurons, and glia
Keratinocytes, melanocytes, and Langerhans
A tendon tears during sports. Which connective tissue is most directly damaged?
Dense fibrous connective tissue
Loose areolar connective tissue
Adipose connective tissue
Hyaline cartilage tissue
A newborn with poor joint cushioning most likely has defects in which cell type?
Chondrocytes producing cartilage matrix
Osteoblasts forming bone lamellae
Adipocytes storing triglycerides
Leukocytes mediating immunity
Severe blood loss reduces oxygen delivery. Which blood component is primarily affected?
Erythrocytes carrying oxygen
Leukocytes producing antibodies
Platelets forming cartilage
Plasma fibers forming osteons
Which pairing of connective tissue with function is most accurate?
Adipose tissue—thermal insulation
Bone tissue—hormone secretion
Cartilage—mineral storage
Loose tissue—action potential conduction
Which epithelial cell type is characterized by cube-like cells with centrally placed nuclei forming a single layer?
Simple cuboidal epithelium with cube-shaped cells
Simple squamous epithelium with flat cells
Simple columnar epithelium with tall cells
Pseudostratified columnar epithelium with varied nuclei
Simple squamous epithelium is best described as which arrangement of cells?
Multiple layers of irregular, round cells
Multiple layers of cube-like cells
Single layer of flat, plate-like cells
Single layer of tall, brick-like cells
Which feature makes pseudostratified columnar epithelium appear multilayered despite being a single layer?
Basement membrane with two distinct layers
Nuclei at different heights within cells
Cells alternating between cube and flat shapes
Cells with multiple nuclei per cell
Which epithelial type would most efficiently allow rapid diffusion across its surface?
Simple squamous epithelium in a single layer
Cuboidal epithelium arranged in thick cords
Simple columnar epithelium with tall cells
Stratified squamous epithelium with many layers
Which pairing correctly matches cell shape with its typical epithelial name?
Flat cells — squamous epithelium
Cube cells — columnar epithelium
Irregular cells — transitional epithelium
Tall cells — cuboidal epithelium
A slide labeled “squamous” shows multiple stacked layers of flattened cells at the surface. Which conclusion is most justified about its likely role?
Propulsion of mucus by coordinated cilia
Protection in areas subject to abrasion
Secretion in small glandular ducts
Gas exchange across minimal barrier
Functionally, what does the right ventricle primarily do during the cardiac cycle?
Receives blood from pulmonary veins
Supplies coronary arteries directly
Pumps oxygenated blood to body
Pumps deoxygenated blood to lungs
Why does cardiac muscle contain abundant mitochondria relative to its volume?
High ATP demand for continuous activity
Calcium storage replacing sarcoplasmic reticulum
Anaerobic metabolism as the dominant pathway
Protein synthesis for rapid hypertrophy needs
Which feature distinguishes cardiac muscle from skeletal muscle at the cellular junctions
Tropomyosin regulating actin sites
Intercalated discs with gap junctions
Sarcomeres arranged in myofibrils
Neuromuscular junction end plates
Erythropoietin is produced mainly by which organ and has what principal effect?
Thymus increases T lymphocyte count
Spleen accelerates cell phagocytosis
Kidney stimulates red cell production
Liver enhances platelet activation
Which component makes up the liquid portion of blood and transports proteins, nutrients, and wastes?
Interstitial fluid between cells
Lymph in the tissues only
Serum without clotting factors
Plasma in the blood volume
Which statement best describes a primary function of bone marrow in adults?
Generates new blood cells continuously
Stores excess plasma proteins long-term
Stores oxygen for skeletal muscles
Filters worn-out erythrocytes exclusively
Which feature best distinguishes cardiac muscle fibers from skeletal muscle fibers
Branched fibers with intercalated discs
Multinucleated fibers with voluntary control
Unbranched fibers without intercalated discs
Spindle-shaped fibers lacking striations
Visceral (smooth) muscle is most likely found in which organ?
Extensor tendons of the wrist
Walls of the stomach
Biceps brachii of the arm
Diaphragm of the thorax
Which set lists ONLY typical locations of visceral (smooth) muscle?
Heart, triceps, esophagus
Stomach, esophagus, gallbladder
Quadriceps, stomach, heart
Gallbladder, biceps, lungs
What does Basal Metabolic Rate (BMR) primarily measure in an endotherm?
Energy for maximal exercise output
Average energy used during daily activities
Minimum energy required to stay alive at rest
Energy for thermoregulation during movement
Under which standardized conditions is BMR determined in humans?
Post-exercise, warm environment, fasting
During sleep, cold stress, fed state
During light activity, room temperature, fed
At rest, thermoneutral, post-absorptive
Standard Metabolic Rate (SMR) is most appropriately applied to which group?
Reptiles that are ectotherms
Birds that migrate long distances
Mammals that are endotherms
Marine mammals during dives
Which statement best contrasts BMR and SMR?
BMR and SMR both require exercise testing
BMR applies to ectotherms, SMR to endotherms
BMR and SMR measure maximal energy output
BMR is for endotherms, SMR is for ectotherms
A researcher measures the resting energy expenditure of a lizard at a specified temperature. Which metric should be reported?
Field Metabolic Rate (FMR)
Basal Metabolic Rate (BMR)
Standard Metabolic Rate (SMR)
Active Metabolic Rate (AMR)
Which feature is shared by both BMR and SMR definitions?
Measured during vigorous activity
Require cold environmental conditions
Reflect minimum energy requirements
Reported only for mammals
Which property of cardiac muscle supports its continuous rhythmic function?
Long, unbranched fibers reduce conduction
Intercalated discs enhance cell-to-cell coupling
Voluntary innervation allows conscious control
Sparse gap junctions prevent impulse spread
